San Bernardino school shooting: 911 audio released

On the same day the frantic 911 calls were released, North Park Elementary School principal Yadira Downing spoke exclusively to Eyewitness News about the murder-suicide that killed an 8-year-old on campus. (KABC)

Anderson fired off 10 shots from a .357 Magnum. Just a month after they got married, Anderson and Smith had marriage problems. In the week before Monday's shooting, Smith told family members that Anderson had tried to get her to return home and threatened her, but she didn't take him seriously.

School officials said they didn't know this when he arrived at the school and was allowed to see his wife.

North Park Elementary School principal Yadira Downing spoke exclusively to Eyewitness News about the deadly incident as she prepared to welcome the children and staff back to school on Monday.

"They said this is their school and they do not want what happened to disrupt their life and to intimidate them to come into work...they wanted to be here for their kids," Downing said about school staff.

A vigil was set to be held at 6 p.m. for Smith, the beloved teacher killed in the shooting, Friday night at Grace Chapel in San Bernardino.